> OK, then we'll need to look for less common problems. When the query > is slow, are you seeing lots of page faults? Process size growth? > What is the rate of reads/writes/marks/fetches? Do you have any guess > as to where the time is going?
Hi Ann, I am afraid most of the values you are asking me about are outside of my ability to gather, at least until I learn where to find them. Well, I do see a strange behavior. When the process started, Firebird fully utilized the CPU core it was running on, with memory requirements being very moderate (the highest I have seen is 70 MB). A few minutes into the operation, the Firebird's CPU load dropped to some 3-5%, with memory load at less than 20 MB. It doesn't seem to change anymore. Process Explorer reveals: - The most active thread seems to be a thread in state Wait:WrResource - I/O bytes fluctuate a lot between 100 and 800 KB - I do not see any open handles to temporary files, only the databases, the lock file, the message file and expected system libraries and devices It seems very much as if Firebird thinks someone is holding a required resource and is waiting until that resource is freed, but I have no idea which resource it could be. Well, well, well... Just as I was finishing the previous sentence, Firebird suddenly once again utilized the CPU completely and a few seconds after that finished the job. Pepak ------------------------------------ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Visit http://www.firebirdsql.org and click the Resources item on the main (top) menu. Try Knowledgebase and FAQ links ! Also search the knowledgebases at http://www.ibphoenix.com ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/firebird-support/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/firebird-support/join (Yahoo! ID required) <*> To change settings via email: firebird-support-dig...@yahoogroups.com firebird-support-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: firebird-support-unsubscr...@yahoogroups.com <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
